GENERATION MEAN ANALYSIS FOR YIELD AND YIELD ATTRIBUTING TRAITS IN LINSEED (Linum usitatissimum L.)
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Date
2019
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Birsa Agricultural University, Ranchi
Abstract
An experiment was conducted at departmental research farm, BAU, Kanke,
Ranchi and Zonal Research Station, Chianki during Rabi 2017-18 to investigate about
variability, nature and magnitude of gene effects, their interactions, heterosis and
inbreeding depression for twelve yield and yield attributing traits following five
parameter model of generation mean analysis. Twenty five genotypes consisting of five
parents, 6F1s, 6F2s, 6F3s, and two checks (T-397 and Parvati) were sown in randomized
block design with three replications.
The analysis of variance revealed highly significant differences among the
treatments for all the characters under study at both the locations.
The present investigation revealed high PCV and GCV at both the location for
characters like, number of primary branches per plant, number of capsules per plant and
seed yield per plant showing the presence of variability for the yield and yield attributing
traits. At both the locations high heritability coupled with high genetic advance as
percent of mean was seen for traits such as seed yield per plant, 1000-seed weight and oil
content whereas, at Ranchi location technical height, plant height and number of
capsules per plant and at Chianki location number of primary branches per plant
exhibited locations high heritability coupled with high genetic advance as percent of
mean indicating preponderance of additive gene action, therefore these traits might be
useful in further breeding programme.
With the help of scaling and joint scaling test presence or absence of epistasis and
adequacy of additive-dominance model respectively were checked and accordingly five
parameter model was followed for estimation of gene effect as well as presence of nonallelic
interactions. Epistasis was observed in almost all the six crosses for the different
traits studied. Duplicate epistasis was more prevalent than complementary epistasis at
both the locations.
Heterosis revealed that the crosses Himalsi-2 X Meera and Mukta X SLS-61 at
Ranchi (L1) location and Himalsi-2 X SLS-61 at Chianki (L2) location were found to be
the promising crosses because of its high yield, quality and disease resistance among the
six crosses studied and thus could be utilized in future breeding programme.
Description
GENERATION MEAN ANALYSIS FOR
YIELD AND YIELD ATTRIBUTING TRAITS
IN LINSEED (Linum usitatissimum L.)